It's not bad on non-politically-charged science and technology. But anything politically relevant is biased to the point of doubtful use.
I was an early contributor to Wikipedia. After a while I became very disillusioned and gave it up, and I wiped all personal information from my user page. It had become a liability.
I can understand that completely. I suspect Wikipedia could’ve been a good idea, but The left used it, like they use all things in that fashion.
I expected. Better from wales
In the area of science and technology the bias is still there.
They are (like all Marxists) scientific materialists.
What that means in practice is that they either ignore or seek to debunk anything science related that does not neatly fit into their world view.
They do so despite openly acknowledging that modern physics is a hot mess:
https://en.wikipedia.org/wiki/List_of_unsolved_problems_in_physics
Interestingly their philosophy section is surprisingly fair—and they give lots of details of philosophical views opposed to scientific materialism.
I guess the leftists don’t think philosophy section is worth tampering with—a symptom of their materialistic world view.